Thirst and excessive urination should be noted for the possibility of diabetes. Because the most typical symptom of diabetes is to drink a lot, urinate a lot and have a tendency to lose weight. It is recommended that everyone must go to the hospital to do a blood sugar test, urine sugar test. If the blood sugar is high, the patient may be diabetic, and if necessary, a glucose tolerance test can be done to assess whether it is diabetes. Urine more urine routine examination, to see whether there is urine sugar, urine ketone bodies and so on. Many patients are thirsty mainly due to diabetic metabolic abnormalities, resulting in the appearance of drinking a lot of water, still appear dry mouth phenomenon, this situation should be taken seriously, early examination to confirm the diagnosis and treatment.